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The PHMSA Pipeline Risk Modeling Work Group was formed as a follow up to the September 2015 Pipeline Risk Modeling Methodologies Public Workshop. The purpose of the group is to provide technical, integrity management and operational input to PHMSA to aid in the development of a pipeline system...
Welcome. This page provides information concerning applications for special permits to operate certain gas transmission pipelines at pressures based on previous class location designation, under circumstances when class location has changed due to development or changes in population density...
Enforcement Guidance documents are available to clarify PHMSA's enforcement authority by identifying and summarizing precedent, including those from interpretations, advisory bulletins, final orders, and decisions on petitions for reconsideration. The material contained in these documents describe the practices used by PHMSA personnel in undertaking their compliance, inspection, and enforcement activities. This guidance facilitates improved enforcement consistency and is particularly helpful when precedence exists for clarifying performance-based requirements.
Underground Natural Gas Storage: Facility Locations
The following map shows the various types and locations of U.S. underground natural gas storage facilities. (Map courtesy of U.S. Energy Information Administration.)
The picture below illustrates the various types of geologic formations used for underground natural gas storage. As noted, the majority of underground gas storage facilities make use of depleted oil and gas fields. Other facilities are found...
PHMSA is reaching out to state entities who have the safety authority over the downhole portion (wells/reservoir/salt cavern) of intrastate natural gas underground storage facilities to participate in our underground storage safety program. To participate, state...
When transmission pipelines traverse through areas of high consequence to people, property or the environment, they are required to follow PHMSA's Integrity Management (IM) requirements. An IM approach identifies specific threats to the pipeline that operators must address through a plan to...
On October 23, 2015, an underground natural gas storage well, Southern California Gas Company’s (SoCal Gas) Aliso Canyon Well SS25, failed. The failure resulted in a sustained and uncontrolled natural gas leak in an area known as Porter Ranch in Los Angeles, California. Over 5,...